A good sesion to me is about four to five hours. My longest has been around sixteen hours.
How long the most you have listened to music...
with no break(except when changing CDs or records?)
I've done it with 15 records. ...well one was 45rpm but the rest was 33rpm 12" with the average time of 38min.
The records were Can, Pat Metheny, King Crimson mostly.